<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>

</head>

<body>
    <script>
        function Book(sumin, zuoze, jiage) {
            this.sumin = sumin;
            this.zuoze = zuoze;
            this.jiage = jiage;
        }

        var book1 = new Book('无忧书店','东野圭吾','42.8');
        console.log(book1);
        
        
    </script>
</body>

</html>